Manufactured from ultra clean high silicon Kobe alloy wire then micro shot peened and nitrided. CNC machined 9˚ locks, high performance conical single wire spring, and chromoly forged retainers.
| Sidewinder® Valve Spring Specs |
| Lift |
Installed Height |
Seat Force |
Force @
Max lift |
Max RPM |
| .650" |
1.860" |
178 lb. |
376 lb. |
6500 |
S&S Sidewinder® Valve Spring Kit for 1984-'04 . . . . 900-0050
S&S Sidewinder® Valve Spring Kit for 2005-up . . . . . 106-5909
Note: S&S recommends roller rocker arms be used when lifting over .585"
